* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --black: #000000;
    --white: #FFFFFF;
    --neutral-200: #E5E5E5;
    --neutral-400: #A3A3A3;
    --neutral-500: #737373;
    --neutral-800: #262626;
    --neutral-900: #171717;
}

body {
    min-height: 100vh;
    background: var(--white);
    font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--neutral-900);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 480px;
    width: 100%;
    text-align: center;
}

.code {
    font-size: 120px;
    font-weight: 500;
    color: var(--neutral-800);
    line-height: 1;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
}

h1 {
    font-size: 32px;
    font-weight: 500;
    color: var(--neutral-800);
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.description {
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    color: var(--neutral-500);
    margin-bottom: 32px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    color: var(--white);
    background: var(--black);
    border-radius: 4px;
    transition: opacity 150ms cubic-bezier(0.0, 0, 0.2, 1);
}

.btn:hover {
    opacity: 0.9;
}

.btn:active {
    transform: scale(0.98);
}

.footer {
    margin-top: 64px;
    padding-top: 24px;
    border-top: 1px solid var(--neutral-200);
}

.footer a {
    color: var(--neutral-900);
    text-decoration: none;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: -0.02em;
    transition: opacity 150ms cubic-bezier(0.0, 0, 0.2, 1);
}

.footer a:hover {
    opacity: 0.7;
}

.footer a span {
    color: var(--neutral-400);
    margin-left: 1px;
}

@media (max-width: 640px) {
    .code {
        font-size: 80px;
    }

    h1 {
        font-size: 24px;
    }
}